UDC 621.396.969
INVESTIGATION OF METHODS TO ESTIMATE SIGNAL ARRIVAL TIME IN IEEE 802.11AZ WIRELESS LOCAL AREA NETWORKS
E. S. Bagaev, post-graduate Student, Department of wireless technologies and systems, SPbSUT, Saint Petersburg, Russia;
orcid.org/ 0009-0006-9761-7032, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
G. A. Fokin, Dr. in technical sciences, full professor, Department of wireless technologies and systems, Head of the Department, SPbSUT, Saint-Petersburg, Russia;
orcid.org/0000-0002-5358-1895, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The work evaluates the accuracy of determining the time of arrival of the ToA signal in wireless local area networks (LAN) of the 802.11az standard for location determination tasks. The aim of the work is to increase the accuracy of positioning LAN devices indoors. To achieve this goal, the scientific task of investi gating the operation of reverse filtering methods and subspaces of MUSIC for ToA evaluation is being solved. The research of the methods is carried out by means of simulation modeling in multipath scenarios according to the standards of the BLS of the TGax group. It is established that for the most optimistic sce nario of radio wave propagation conditions, formalized by the model of radio channel A of the TGax group, the minimum COE estimates of ToA are 0,57 and 0,31 ns for the reverse filtering method and the MUSIC subspace method, respectively. The established gain in the accuracy of primary measurements by the MUSIC method serves as a scientific justification for its practical implementation to achieve the set goal.
Key words: wireless local area network, positioning, 802.11az standard, multipath channel, Time-Of Arrival, super-resolution algorithm.